diff --git a/doc/mgmt-api.txt b/doc/mgmt-api.txt
index 8393bbf..9384f70 100644
--- a/doc/mgmt-api.txt
+++ b/doc/mgmt-api.txt
@@ -3061,6 +3061,7 @@ Device Disconnected Event
 		1	Connection timeout
 		2	Connection terminated by local host
 		3	Connection terminated by remote host
+		4	Connection terminated due to authentication failure
 
 	Note that the local/remote distinction just determines which side
 	terminated the low-level connection, regardless of the